Filter



L, B. FLOOD Jan. 15, 1935.

FILTER Filed Sept. 6, 1955 lllllllllllllllllllllllll II Patented Jan. 15, 1935 I g I 1,987,847

UNITED STATES TE -OFF CE i 1,987,847 f 1 I FILTER 'Leon'B. Flood, Bothell, Waslil, 'assignoiof onefourth to-Robert C.-1V{oflitt, Seattle, Wash." I Application September 6,. '1933,'sss1.1-t..68;3a' i 1 Claim. loll, clo -1e51,,

My-invention relates to filters and moreparprincipleynamely the by-pass method or system ticularly to the combination of a filter with the 'is susceptib'le of various arrangements all of which circulatory cooling system for internal combusare equally adaptable'to the one method of retion engines. Qertain objects of the invention moving a" portion ofthe' circulatingliquid from 5 are to provide a filter, in combination'witlr the me main-circulatorystream, filtering same and 5 circulatory cooling system of internal combuspassingfit back into the main stream. In Figs. tion engines, whereby a portion of the circulating fl -to 5' ofthe drawing I have shown the simplest liquid is continually taken fromthe main chow and most economical means for accomplishing latory stream, passedthrough the filter and back the results of the invention which I will now into the main stream, and whereby all silt, sedidescribe in detail.

mentyand other foreign matter is removed from Referring particularly to Fig. 1, the numeral the liquid thus preventing any clogging' of the '5 designates-an internal-combustion engine of radiator or other parts of the cooling system. any type or'desig'nyandwhich comprises the While I am aware that several prior attempts usuarerigme block 6," radiator 7;lower radiator have been made to successfully accomplish the outlet conduit 8, and upper inlet radiator con- 15 desired result, these attempts have been'confined 'duit '9. Said conduits connect, theradiator and to the method of placing a screen or other fllterengine block and thus form the circulatory cooling medium directly inthe line'offlow of the ing systerrri'of the engine The cooling liquid main stream of the cooling" liquid. This intermay'be circulated around thesystem by a' pump,

ception of the main stream by the filtering eleby. thermo-siphon; means, or byany other cir- 20 ment results in impeding its flow and ultimately culat ory mean'sj. in clogging the filtering element itself to an ex- 'My in'ventionprimarily consists of a filter comtent which seriously interferes with the free cir- 'prising'anouter' casing 10 having an elongated culatory movement of the liquid. My invention openingll in its top. [A tube l2extendsfixedly u is based on an entirely different principle, namethrough said elongated'opening into the casing ly the bypass method or system and consists in and is centrally fixed to its bottom. Said tube means whereby only a portion of the circulating isperforated upwardly from its bottom-a greater liquid removed from the main stream, filtered portion of its length and an annular flange or and passed back into the main stream without disc 13 is fixed to the tube immediately above its interfering with the free circulatory movement perforations. A filter core 14, preferably made 30 of the main stream. of compressed animal hair, is secured around the With the foregoing and other objects in view tube, between said disc and the bottom of the which will appear as the description proceeds, casing, by means of a wire binding 15. the invention consists of the novel construction, One side of the tube 12 extends upwardly adaptation, combination and arrangement of through the elongated opening 11 and said tube 35 parts hereinafter described and claimed. These closes said opening with the exception of a small objects are accomplished by devices illustrated passage 16 through the top of the casing on the in the accompanying drawing; wherein: Figure outside of the tube and opposite to its upstanding l is a view in side elevation showing the filter conportion. Said upstanding portion of the tube is nected to the upper inlet conduit of an internal curved toward said small passage and is then 40 combustion engine; Fig. 2 is a view in central deflected away in the opposite direction to form vertical section through the filter taken substana. sharp shoulder 17 and a lip or shield portion is tially on a broken line 2-2 of Fig. 1; Fig. 3 is a which bridges the top opening of the tube and corresponding view taken on a broken line 3-3 leaves an outlet 19 therefor as most clearly shown 6 of Fig. 2; Fig. 4 is a top plan view of the filter; in Fig. 3. The upper conduit 9 is provided with Fig. 5 is a bottom plan view showing the portion an opening 20, corresponding with the opening 11, of the upper radiator conduit that is adapted and a flange 21 is formed around said opening 20 to be connected to the top of the filter; Fig. 6 is integral with the conduit. The ends of the flange a view in side elevation showing the filter conare provided with holes which receive upstanding 60 nected and installed between the upper and lower studs 22 fixed to the top of the casing 10 and nuts radiator conduits; and Fig. 7 is a corresponding are used to secure the flange and filter together view showing the filter connected and interposed thus retaining the filter in offset relation on the between the upper radiator conduit and the raconduit as will be understood diator itself. when the filter is secured to the conduit 9 the In reducing my invention to practice its basic opening 11 in its top coincides with the opening 55 20 in the conduit and a water tight connection is made with the small passage 16 communicating with the interior of the filter and the lip or shield 18 of the tube 12 projecting into the conduit as clearly shown in Fig. 3. The main stream of the circulating liquid moves in the direction indicated by the long arrow and a portion of same strikes the shoulder 17 and is deflected into the filter through the passage 16. The filter istherefore continually supplied with liquid vwhich "fipa'sses through the filter core 14 into the perforated tube 12 and through its outlet 19 back into the main circulating stream.

In the foregoing description it will be apparent effected and freely continues "its 3.mevementf through the circulatory system, whileonly'a small portion thereof is caused tomsclhxwghthefilter. The filter core 14, being made of animal hair, is very porous and the tube 12 is amply perforated so that only slight resistance is encountered by the liquid in its. passage through the filter. The lip 18 atthe top ofthe tube .actsesashieldiagainst the force of the main stream within the conduit 9 and promotes circulation of the liquid through the filter. It will now be obvious that I have provided a by passmeans fonfilteringthe circulating liquid which means isvofiset from the circulatory system and does not interfere with the passage of liquid therethrough. A drain plug .23 may be installed .in the bottom of the filter casing 1-0 in communication with the at t he;tube 12.for the purpose of draining but the filter.

I In Figs. 6 and 7 of the drawing Ihave'shown the filter-connected ;to the upper conduit!) as'in the foregoingidescription, and in Fig. 6a pipe 25 forms a connection between the bottom lot the filter and the lower conduit 8'; whilein .7 a pipe 25 connects the 'bottom of the filter directly with the radiator]. Inboth these lattercases the lip or shield 18 may be fasteneddownand thus serve .as a closure for theoutlet, l9. lOliherwise the actionof thefilter is thesameandadhenes to the Joy-pass principle in removing a portion of the circulating liquid from the main stream ;and ..r.eturning it theretdafterit'is filtered. filter may be connected to various other of .the

pass through the filter.

circulatory system, as for instance the engine block 6, and in fact the invention contemplates connecting the filter directly to or across any portion of the circulatory system as long as the method of removing a portion of the liquid from the system at one point and restoring it to the system at another point after it has passed through the offset filter is adhered to.

, In the action of the filter, assunung-.,that onetenth of the volume of liquidwithin the circulatory system passes through the filter at each circuit, ten complete circuits of the liquid will, of

course, be necessary in order for all the liquid to When the liquid has completely through the filter all foreign matterwill have been removed therefrom and depositedin the filter. It is an object of the invention to provide a filter that is very inexpensive in construction and which is readily detachable from the cooling system so that when same becomes sutficiently'filled with sediment it may be discarded-and replaced by anew filter.

"Havingt-hu's described my invention, it being *u'nderstoodthatthe device herein shown and described isintended'as anillustration of one means whereby .theprinciples of the invention may be reduced to practice,'an'd that such changes in its construction and arrangement may be resorted to as do not involve a departure'from the scope and. spirit of the invention, what I claim and desire to secure by Letters Patent of, the United statesi z e- In .a combined circulatory cooling eystem for internal combustion engines and a filter connected thereto .in effect relation, means whereby a portion of liquid circulating the system is removed iiaerefrem at one point, passed through thefilteryand restored to the system at .another pouit, .means comprising a perforated tube extending from cornmLm-icatiuezrelation with the system into the filter ,:a filter cor disposed around the perforatedportionof the tube, a lip projecting from the tube into system, .anda passage conmeeting the filter with th system exteriorly of the tube andadjacent the lip.

.LEON BJILOOD. 

